Twitter auto-show mode

gistfile1.txt

javascript: (function () {
    var newTweets = 0,
        modes = [];

    function addMode(modeName) {
        var title = 'Tweets [';
        modes.push(modeName);
        title += modes.join(', ') + ']';
        $('#content-main-heading').text(title);
    }
    if (!window.addMode) {
        window.addMode = addMode;
    }
    function filteredNewNodeCallback(root, selector, callback) {
        var obs, i;
        if (!root || !selector || !callback) {
            return;
        }
        function filterAndCallback(node) {
            var matches = [],
                childMatches;
            if (node.matches(selector)) {
                matches.push(node);
            }
            childMatches = node.querySelectorAll(selector);
            if (childMatches.length !== 0) {
                matches = matches.concat([].slice.call(childMatches))
            }
            matches.map(callback);
        }
        obs = new MutationObserver(function (mutations) {
            mutations.forEach(function (mutation) {
                for (i = 0; i < mutation.addedNodes.length; i++) {
                    if (mutation.addedNodes[i].nodeType === 1) {
                        filterAndCallback(mutation.addedNodes[i]);
                    }
                }
            })
        });
        obs.observe(root, {
            childList: true,
            subtree: true
        });
    }
    function updateTitle() {
        var title = 'Twitter';
        if (newTweets > 0) {
            title += ' (' + newTweets + ')';
        }
        document.title = title;
    }
    $('<style>.new-tweet.js-stream-item{background: #FEB !important;}.js-new-items-bar-container{height:0 !important;}</style>').appendTo('body');
    $('.home-stream').on('mouseover', '.new-tweet', function () {
        $(this).removeClass('new-tweet');
        newTweets--;
        updateTitle();
    });
    filteredNewNodeCallback($('.js-new-items-bar-container')[0], '.js-new-tweets-bar', function (newTweetsBar) {
        newTweetsBar.click();
    });
    filteredNewNodeCallback($('.stream-container')[0], '.js-stream-item', function (tweet) {
        tweet.classList.add('new-tweet');
        newTweets++;
        updateTitle();
    });
    window.addMode('auto-show');
}());